General

Engineer's Note

The Samsung M391A1K43BB1-CRCQ0 is an 8GB DDR4-2400 UDIMM with ECC, optimized for entry-level servers and workstations requiring data integrity in single-socket platforms. Its unbuffered design and single-rank x8 organization reduce latency and power consumption, making it ideal for light virtualization, file serving, and memory-sensitive applications where error correction is critical.

Technical Specs & Insights

1. Eight gigabyte capacity per DIMM provides ample headroom for lightweight virtualization hosts, comfortably running multiple containerized microservices or smaller VM instances without immediate scaling pressure.
2. ECC error correction silently remedies single-bit memory faults, preserving data accuracy in always-on file servers or entry-level NAS appliances where integrity is non-negotiable.
3. Unbuffered signal type shaves off register latency, yielding faster first-word access that benefits latency-sensitive edge computing nodes or small caching tiers.
4. The 2400 MT/s speed sustains 19.2 GB/s of peak bandwidth per channel, keeping data pipelines fluid when multiple tenants or backup jobs hit the memory subsystem concurrently.
5. Single Rank x8 organization lowers electrical loading, ensuring stable command-addressing behavior across fully populated DIMM slots in a compact single-socket server.

Why These Specs Matter

The Samsung M391A1K43BB1-CRCQ0 8GB DDR4 UDIMM is purpose-built for always-on workstations and entry servers where data integrity directly defines uptime. Its ECC function silently corrects single-bit flips induced by electrical noise or cosmic rays, so in a multi-VM test cluster your hypervisor avoids mystery crashes and silent log corruption that would void days of regression analysis. The unbuffered architecture skips the register chip, keeping CAS‑17 access latency low; for an in‑memory store like Redis, this delivers the sub‑millisecond response that real‑time dashboards and caching layers demand. Operating at 1.2V, the module draws measurably less power inside a dense micro‑server rack, shrinking 24/7 thermal load, preventing throttling, and extending hardware life. Finally, the single‑rank x8 2400MHz configuration guarantees straightforward plug‑and‑play compatibility with Xeon E and Core workstation platforms, allowing you to move modules from a developer’s virtualization rig to a production database without tuning. It means your operational data stays consistent, your query latency drops, and your monthly cooling bill shrinks—no complex tweaks required.

Endurance & Reliability

General Virtualization
Populate all memory channels uniformly with identical M391A1K43BB1-CRCQ0 modules to balance capacity and bandwidth. For a typical dual-socket or single-socket hypervisor, install four or eight 8 GB UDIMMs (32 GB or 64 GB total) in a balanced interleaved configuration. ECC protection ensures guest uptime, while single‑rank x8 DIMMs keep latency low under mixed workloads.

In‑Memory Database
Maximise capacity by fully populating every available DIMM slot with these unbuffered ECC modules. A server with 8 slots delivers 64 GB, and a 16‑slot board reaches 128 GB—critical for holding entire datasets in RAM. Keep all channels evenly loaded to sustain the required memory bandwidth, and verify the platform supports the CL17 latency at the rated 2400 MT/s speed.

High‑Performance Computing
Achieve peak memory bandwidth per core by installing one DIMM per channel (1DPC) across all channels. In an 8‑channel system, 8 × 8 GB yields 64 GB of high‑throughput ECC memory, minimising NUMA bottlenecks. Use identical single‑rank modules to avoid signal speed reductions, and configure the cluster nodes identically for predictable parallel job scaling.

Verified Compatibility

Server memory rigorously tested for compatibility with Dell PowerEdge T140/T340, HPE ProLiant DL20 Gen10, Lenovo ThinkSystem ST250.

FAQ